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Method for preparing potassium hexatitanate lamellar crystal by using solid phase method

A technology of potassium hexatitanate and solid-phase method, which is applied in chemical instruments and methods, self-solid, single crystal growth, etc. It can solve the problems of large damage to the reaction container, increase the container, and cracking, so as to simplify the production process and improve the purity. and quality, the effect of avoiding industrial wastewater

Inactive Publication Date: 2017-06-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reaction has higher requirements on the purity of the titanium source, which increases the production cost; the rapid cooling and cooling will cause greater damage to the reaction container, which increases the risk of container collapse

Method used

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  • Method for preparing potassium hexatitanate lamellar crystal by using solid phase method
  • Method for preparing potassium hexatitanate lamellar crystal by using solid phase method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] TiO 2 and K 2 CO 3 According to molar ratio TiO 2 :K 2 CO 3 = 2.1:1.0 ratio of uniform mixing, then add 3wt% crystal form inducer, place in a stirrer and mix evenly; then put the mixture in a muffle furnace for high-temperature calcination, the heating rate is 5°C / min, and the temperature is raised to 1000 ℃, keep warm for 2 hours, and cool with the furnace. The prepared potassium tetratitanate lamellae were broken, washed with boiling water, filtered or centrifuged, and then dried in an oven at 50° C. for 24 hours. The dried product was placed in a muffle furnace again, calcined at 800° C. for 3 h, and cooled with the furnace, thereby synthesizing potassium hexatitanate lamellae. The X-ray diffraction analysis shows that the chemical formula of the product obtained is K 2 Ti 6 o 13 , The scanning electron microscope observation shows that the potassium hexatitanate is in the form of flakes, and the measured platelet size of the potassium hexatitanate is: the a...

Embodiment 2

[0029] TiO 2 and K 2 CO 3 According to molar ratio TiO 2 :K 2 CO 3 = 3.8:0.8 ratio of uniform mixing, then add 5wt% crystal form inducer, put in a stirrer and mix evenly; then put the mixture in a muffle furnace for high-temperature calcination, the heating rate is 3 °C / min, and the temperature is raised to 1100 ℃, keep warm for 1 hour, and cool with the furnace. The prepared potassium tetratitanate lamellae were broken, washed with boiling water, filtered or centrifuged, and then dried in an oven at 60° C. for 15 hours. The dried product was placed in the muffle furnace again, calcined at 900° C. for 1 h, and cooled with the furnace, thereby synthesizing potassium hexatitanate lamellae. The X-ray diffraction analysis shows that the chemical formula of the product obtained is K 2 Ti 6 o 13 , The scanning electron microscope observation shows that the potassium hexatitanate is in the form of flakes, and the measured platelet size of the potassium hexatitanate is: the a...

Embodiment 3

[0031] TiO 2 and K 2 CO 3 According to molar ratio TiO 2 :K 2 CO 3 = 4.8:2.0 The ratio is evenly mixed, and then 5wt% crystal form inducer is added, placed in a stirrer and mixed evenly; then the mixture is placed in a muffle furnace for high-temperature calcination, the heating rate is 7 ° C / min, and the temperature is raised to 900 ℃, keep warm for 8 hours, and cool with the furnace. The prepared potassium tetratitanate lamellae were broken, washed with boiling water, filtered or centrifuged, and then dried in an oven at 70° C. for 8 hours. The dried product was placed in a muffle furnace again, calcined at 700° C. for 3 h, and cooled with the furnace, thereby synthesizing potassium hexatitanate lamellae. The X-ray diffraction analysis shows that the chemical formula of the product obtained is K 2 Ti 6 o 13 , The scanning electron microscope observation shows that the potassium hexatitanate is in the form of flakes, and the measured platelet size of the potassium ...

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Abstract

The invention discloses a method for preparing potassium hexatitanate lamellar crystal by using a solid phase method, belonging to the technical field of preparing an inorganic material. The method is mainly characterized by comprising the following steps: by taking potassium source and tiantium source as raw materials, adding less crystal form inducer, evenly mixing, then calcinating the mixture at high temperature to obtain potassium tetratitanate lamellar crystal, and performing secondary calination through taking the potassium tetratitanate lamellar crystal as a precursor, thus preparing the potassium hexatitanate lamellar crystal with the average diameter of being 1.0-5.7mum and the average thickness of being 0.1-0.5mum. The potassium hexatitanate lamellar crystal is prepared by using the solid phase method rather than the traditional wet technology, not only can the production proceudres be simplified and the energy consumption of enterprises be reduced and potassium tetratitanate lamellar crystal can be prepared at one step by utilizing the crystal form inducer, but also the treatment problem of waste water generated by using the wet preparation technology can be avoided, therefore, the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing potassium hexatitanate lamellar crystals by a solid-phase method, and belongs to the technical field of inorganic material preparation. Background technique [0002] Potassium hexatitanate platelets (K 2 Ti 6 o 13 ) has excellent mechanical properties, and its special layered structure endows it with many unique physical and chemical properties. , insulation materials and other fields, so it is increasingly valued by the automotive industry. As a new generation of friction material, the application of potassium hexatitanate platelets in brake pads can not only significantly improve the braking performance, but also reduce brake noise, greatly improve the foot feel during braking, and increase the service life of brake pads. At present, ceramic brake pads containing potassium hexatitanate platelets are on the rise at home and abroad. This is mainly because the traditional wet preparation process is com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B1/10
CPCC30B29/32C30B1/10
Inventor 商少明刘浩顾丹
Owner JIANGNAN UNIV
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